/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : usbd_storage_if.c
  * @version        : v1.0_Cube
  * @brief          : Memory management layer.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "usbd_storage_if.h"

/* USER CODE BEGIN INCLUDE */
#include "sdio.h"
/* USER CODE END INCLUDE */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @brief Usb device.
  * @{
  */

/** @defgroup USBD_STORAGE
  * @brief Usb mass storage device module
  * @{
  */

/** @defgroup USBD_STORAGE_Private_TypesDefinitions
  * @brief Private types.
  * @{
  */

/* USER CODE BEGIN PRIVATE_TYPES */

/* USER CODE END PRIVATE_TYPES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_Defines
  * @brief Private defines.
  * @{
  */

#define STORAGE_LUN_NBR                  1
#define STORAGE_BLK_NBR                  0x10000
#define STORAGE_BLK_SIZ                  0x200

/* USER CODE BEGIN PRIVATE_DEFINES */

/* USER CODE END PRIVATE_DEFINES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_Macros
  * @brief Private macros.
  * @{
  */

/* USER CODE BEGIN PRIVATE_MACRO */

/* USER CODE END PRIVATE_MACRO */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_Variables
  * @brief Private variables.
  * @{
  */

/* USER CODE BEGIN INQUIRY_DATA_FS */
/** USB Mass storage Standard Inquiry Data. */
const int8_t STORAGE_Inquirydata_FS[] = {/* 36 */

        /* LUN 0 */
        0x00,
        0x80,
        0x02,
        0x02,
        (STANDARD_INQUIRY_DATA_LEN - 5),
        0x00,
        0x00,
        0x00,
        'S', 'T', 'M', ' ', ' ', ' ', ' ', ' ', /* Manufacturer : 8 bytes */
        'P', 'r', 'o', 'd', 'u', 'c', 't', ' ', /* Product      : 16 Bytes */
        ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
        '0', '.', '0', '1'                      /* Version      : 4 Bytes */
};
/* USER CODE END INQUIRY_DATA_FS */

/* USER CODE BEGIN PRIVATE_VARIABLES */

/* USER CODE END PRIVATE_VARIABLES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Exported_Variables
  * @brief Public variables.
  * @{
  */

extern USBD_HandleTypeDef hUsbDeviceFS;

/* USER CODE BEGIN EXPORTED_VARIABLES */

/* USER CODE END EXPORTED_VARIABLES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_FunctionPrototypes
  * @brief Private functions declaration.
  * @{
  */

static int8_t STORAGE_Init_FS(uint8_t lun);

static int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size);

static int8_t STORAGE_IsReady_FS(uint8_t lun);

static int8_t STORAGE_IsWriteProtected_FS(uint8_t lun);

static int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);

static int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);

static int8_t STORAGE_GetMaxLun_FS(void);

/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */

/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */

/**
  * @}
  */

USBD_StorageTypeDef USBD_Storage_Interface_fops_FS =
        {
                STORAGE_Init_FS,
                STORAGE_GetCapacity_FS,
                STORAGE_IsReady_FS,
                STORAGE_IsWriteProtected_FS,
                STORAGE_Read_FS,
                STORAGE_Write_FS,
                STORAGE_GetMaxLun_FS,
                (int8_t *) STORAGE_Inquirydata_FS
        };

/* Private functions ---------------------------------------------------------*/
/**
  * @brief  Initializes the storage unit (medium) over USB FS IP
  * @param  lun: Logical unit number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_Init_FS(uint8_t lun) {
    /* USER CODE BEGIN 2 */
    UNUSED(lun);

    return (USBD_OK);
    /* USER CODE END 2 */
}

/**
  * @brief  Returns the medium capacity.
  * @param  lun: Logical unit number.
  * @param  block_num: Number of total block number.
  * @param  block_size: Block size.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size) {
    /* USER CODE BEGIN 3 */
    HAL_SD_CardInfoTypeDef cardInfo;
    HAL_StatusTypeDef res = HAL_SD_GetCardInfo(&hsd, &cardInfo);
    if (res == HAL_OK) {
        * block_num = cardInfo.BlockNbr;
        *block_size = cardInfo.BlockSize;
    } else {
        * block_num = STORAGE_BLK_NBR;
        *block_size = STORAGE_BLK_SIZ;
    }
    return (USBD_OK);
    /* USER CODE END 3 */
}

/**
  * @brief   Checks whether the medium is ready.
  * @param  lun:  Logical unit number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_IsReady_FS(uint8_t lun) {
    /* USER CODE BEGIN 4 */
    UNUSED(lun);

    return (USBD_OK);
    /* USER CODE END 4 */
}

/**
  * @brief  Checks whether the medium is write protected.
  * @param  lun: Logical unit number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_IsWriteProtected_FS(uint8_t lun) {
    /* USER CODE BEGIN 5 */
    UNUSED(lun);

    return (USBD_OK);
    /* USER CODE END 5 */
}

/**
  * @brief  Reads data from the medium.
  * @param  lun: Logical unit number.
  * @param  buf: data buffer.
  * @param  blk_addr: Logical block address.
  * @param  blk_len: Blocks number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) {
    /* USER CODE BEGIN 6 */
    uint32_t Timeout = 10000;
    HAL_StatusTypeDef res = HAL_SD_ReadBlocks(&hsd, buf, blk_addr, blk_len, Timeout);
    HAL_SD_CardStateTypeDef status = HAL_SD_CARD_RECEIVING;
    if (res == HAL_OK) {
        while (status != HAL_SD_CARD_TRANSFER) {
            status = HAL_SD_GetCardState(&hsd);
        }
        return (USBD_OK);
    } else {
        return (USBD_FAIL);
    }
    /* USER CODE END 6 */
}

/**
  * @brief  Writes data into the medium.
  * @param  lun: Logical unit number.
  * @param  buf: data buffer.
  * @param  blk_addr: Logical block address.
  * @param  blk_len: Blocks number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) {
    /* USER CODE BEGIN 7 */
    uint32_t Timeout = 10000;
    HAL_StatusTypeDef res = HAL_SD_WriteBlocks(&hsd, buf, blk_addr, blk_len, Timeout);
    HAL_SD_CardStateTypeDef status = HAL_SD_CARD_SENDING;
    if (res == HAL_OK) {
        while (status != HAL_SD_CARD_TRANSFER) {
            status = HAL_SD_GetCardState(&hsd);
        }
        return (USBD_OK);
    } else {
        return (USBD_FAIL);
    }
    /* USER CODE END 7 */
}

/**
  * @brief  Returns the Max Supported LUNs.
  * @param  None
  * @retval Lun(s) number.
  */
int8_t STORAGE_GetMaxLun_FS(void) {
    /* USER CODE BEGIN 8 */
    return (STORAGE_LUN_NBR - 1);
    /* USER CODE END 8 */
}

/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */

/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */

/**
  * @}
  */

/**
  * @}
  */

